Use the triangle inequality theorem

Step-by-step explanation:

B) 9<x<5

X has to be more than 9.  9+8=17, which would be a straight line.

X has to be less than 25.  17+8=25, which would be a straight line.

9 < x < 25

Step-by-step explanation:

The length of a side of a triangle must be greater than the difference between the lengths of the other sides and less than the sum of the lengths of other sides.

x must be greater than the difference between 17 and 8.

17 - 8 = 9

x > 9

x must be less than the sum of 17 and 8.

x < 17 + 8

x < 25

When you put the two inequalities above together, you get:

9 < x < 25

d. it is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

step-by-step explanation: